High-fidelity ion-trap quantum computing with hyperfine clock states

Abstract

We propose the implementation of a geometric-phase gate on magnetic-field-insensitive qubits with ${\hat{\sigma }}^z$-dependent forces for trapped ion quantum computing. The force is exerted by two laser beams in a Raman configuration. Qubit-state dependency is achieved by a small frequency detuning from the virtually-excited state. Ion species with excited states of long radiative lifetimes are used to reduce the chance of a spontaneous photon emission to less than 10${}^{-8}$ per gate-run. This eliminates the main source of gate infidelity of previous implementations. With this scheme it seems possible to reach the fault tolerant threshold.

4 pages, 1 figure

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Cited by in corpus (12)

• Quantum computing with trapped ions
• Experimental quantum information processing with 43Ca+ ions
• Adiabatic quantum metrology with strongly correlated quantum optical systems
• Quantum control of the hyperfine-coupled electron and nuclear spins in alkali atoms
• Geometric phase gate on an optical transition for ion trap quantum computation
• A high fidelity light-shift gate for clock-state qubits
• Decoherence-free preparation of Dicke states of trapped ions by collective stimulated Raman adiabatic passage
• A Wavelength-Insensitive, Multispecies Entangling Gate for Group-2 Atomic Ions
• Trapped Ion Quantum Computing using Optical Tweezers and Electric Fields
• Synthesizing a ${\hat{\sigma }}_z$ spin-dependent force for optical, metastable, and ground state trapped-ion qubits
• Entangling gates for trapped-ion quantum computation and quantum simulation
• Quantum gate in the decoherence-free subspace of trapped ion qubits